This is a tiny regression from bug 691663 that I just found: If you "Unlink This Device" in the Sync prefs pane, the prefs pane flickers and goes back to displaying the page for when you have Sync set up (which is wrong). I believe the reason for that is because we reset Status.sync too late in Service.startOver.
Fix incoming.

STRs for QA:
- Choose a profile that has Sync set up (or set up Sync)
- Click on "Unlink This Device" in the Sync prefpane
- ensure the prefpane shows the "Set up Sync" and "Pair a Device" links
Please note: this regression was introduced by bug 691663. "Unlink This Device" is an essential feature of Sync, much like the Sync setup wizard, and should be part of every smoketest.

Comment on attachment 566093[details][diff][review]
v1
Requesting approval for Beta and Aurora since bug 691663 which caused this tiny regression was landed in those places last week. I apologize for causing that and made sure to follow up with QA since the regression should really have been found when running smoketests against bug 691663 (which we did before landing in Aurora and Beta).